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@einen gieten @anni @fitta HIRAM N. RELYEA, OF WARSAW, NEW YORK,ASSIGNOR TOr HIMSELF AN D MlLLS L. RICE.

LettersPatent No. 61,252, dated January 15, 1867.

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TO ALL WHOM 1T MAY CONCERN:

Be it known that I, HIRAM N. RELYEA, of Warsaw, in the county of'Wyoming and State of New York, have invented a new and improvedMillstone Pick; and I do hereby declare that Athe following is a. full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had tothe-accompanying drawings forming part of this specification, in which-Figure 1 is afront or rear view of a millstone pick, partly in section,constructed according to my invention.

Figure 2. a longitudinal section of the same, taken in the line w :12,fig. 1.

Similarletters of reference indicate corresponding parts.

It isl the object of my invention to produce a millstone pick closelyresembling in size, weight, and form the ordinary pick, and adapted touse in the common holder or handle, with which every miller is suppliedthe same being provided With blades or cutters which are seltfastening,and removable for sharpening when worn out, whereby greater durabilityand economy are obtained and it consists of a diamond-shaped stock orhead of malleable metal, provided with slightly tapering sockets open atone end only, at each extremity of the head, in combination with cuttingblades of nearly equal thickness, one end of Whichhas acutting-edge andthe other a Wedging-shank fitting tightly into the socket provided inthe hea-d,and removable by means of a {lat-sided Wedging key, and holesfor its insertion at the foot of each socket. Experience has proven thatthe for1n\of the common diamond-shaped pick is the best form, having thegreatest Weight in the centre, at or near the point at which it is heldby the handle, which balances it, enabling the blows to be struck withgreater ease, precision, and uniformity than when it is otherwisedisposed, and especially when the Weight is transferred nearer to theextremities. Though perfect in form it has the disadvantage of beingexpensive in its original cost, and in keeping it in working condition,.being wholly made of the best steel, and requiring to be drawn out byforging and retempered frequently during use, in consequence of thethickness of the metal preventing it from hardening uniformlythroughout.V It also loses both in weight and proper form from the lossof metal sustained by Wear, and forging, and grinding.

These objection I obviate; first, by making ahead, A, of the usual forrnand size, but of Wrought orinalleaole iron, or soft steel, which litsthe common holder in the usual manner. The ends are truncated, and eachprovided with a slightly tapering socket, a, which receives the shank ofthe blades B B. lhesc are made of the very best steel, andbeing thin andof nearly uniform size, receive an even degree of hardness throughout intempering. Their Shanks, a', are not pointed, but merely tapersufficiently to t the sockets 0, so tightly that it requires severalhard blows of the pick to drive them in until vtheir ends rest againstthe bottom of the sockets, when they become as solid as if they were apart of 'the head, the softness of which allows it to conform perfectlyto the hardened shank. As these blades seldom, if ever, requiretempering anew, and are ground Without detaching when dull, theirremoval is seldom required, except to replace them by new ones when`vorn too short to be of service. So fixed are they that their removalrequires special means, which are supplied by the holes Z1, passingthrough the head in such a position that the centres nearly or quitecoincide with the bottom of the sockets. Into these holes a round andpreferably taper pin or key, (shown in red, c, iig. 2,) having one sideiiattened, is driven, which loosens the blades, arid causes theirrelease Wit-hout eii'ort, or injury to the metal of either part.

' What I claim my invention, and desire to secure by Letters Patent,.is--

The diamond-shaped truncated head A, formed' of malleable metal, andprovided with sockets a. e, transverse holes h in combination with thehardened blades B E, and key c, constructed and arranged substantiallyand for the purposes set forth.

HIB-hilft E. RELYE.

Witnesses:

L. Locnwoon Temen, G. E. JENKINS.

